package com.yff.tuan.util;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
/**
 *
 * @author Administrator
 *
 */
public class AESUtil {
	
	private final static String privateKey = "www.piadd.com.cn";

    // 加密
    public static String Encrypt(String sSrc/*, String sKey*/){
    	try {
    		/*if (sKey == null) {
            	System.out.print("Key为空null");
            	return null;
	        }
	        // 判断Key是否为16位
	        if (sKey.length() != 16) {
	            System.out.print("Key长度不是16位");
	            return null;
	        }*/
	        byte[] raw = privateKey.getBytes("utf-8");
	        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
	        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
	        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
	        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
	
	        return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
    }

    // 解密
    public static String Decrypt(String sSrc/*, String sKey*/){
        try {
           /* // 判断Key是否正确
            if (sKey == null) {
                System.out.print("Key为空null");
                return null;
            }
            // 判断Key是否为16位
            if (sKey.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }*/
            byte[] raw = privateKey.getBytes("utf-8");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
            byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密
            try {
                byte[] original = cipher.doFinal(encrypted1);
                String originalString = new String(original,"utf-8");
                return originalString;
            } catch (Exception e) {
                System.out.println(e.toString());
                return null;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) throws Exception {
        // 加密
        String enString = AESUtil.Encrypt("123456");
        System.out.println("加密后的字串是：" + enString);

        // 解密
        String DeString = AESUtil.Decrypt(enString);
        System.out.println("解密后的字串是：" + DeString);
    }
}